Flooding has been reported across the city on Friday and many roads became chaotic as they turned into deep streams and became gridlocked with traffic.

Rail boom gates were stuck in several locations, including on busy South Road, leading to enormous traffic jams.

At Woodville, in the north-west suburbs, the deep waters on Port Road caused major problems.

Emergency services have dealt with hundreds of calls about flooding across most parts of the metropolitan area.

Saint Andrews Hospital in South Terrace in the city was forced to cope with sudden floodwaters and an underground car park there was evacuated swiftly, preventing cars from disappearing under the rising water.

On Friday, the residents of Mary Street in suburban Peterhead were busy putting sandbags around their properties to try to keep out the rising waters.

Fire crews arrived and helped pump some of the water away from the houses.

But Ben Barnett said his house did not fare well.

"My wife woke up this morning, went down to the lounge room and stepped down and the water was up to her ankles," he said.

"We have a pond in the backyard so all our goldfish are swimming around in the backyard."

Also in Peterhead, Neil Gibbens said his young daughter's room flooded, then the trouble spread.

"As we tried to stop that, the water is coming around the back, so our kitchen is flooded," he said.

Creeks burst their banks in several suburbs, including at Mawson Lakes in the north.

Adelaide's total rainfall since the deluge began had exceeded 90 millimetres by Friday afternoon.

You have no doubt been hearing a lot about the Paris Agreement and know that it pertains to climate change, but are too embarrassed at this stage to ask for an overall explanation of what it's all about.